Regal Behemoth 
Creature — Dinosaur
Trample When this creature enters, you become the monarch. Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL